Frontage Road 615 over Int Canyon-I 15
GoodCascade County, Montana · 11M SW Cascade · Structure no. L07615000+01601
- Built
- 1968
- 57 years old
- Condition
- Good
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 184 ft
- 3 main spans
- Daily traffic
- 100
- 2025 count
- Owner
- State
- State Highway Agency
About this bridge
Frontage Road 615 over Int Canyon-I 15 is a prestressed concrete stringer/multi-beam or girder carrying Frontage Road 615 over Int Canyon-I 15 in Cascade County, Montana. It was built in 1968, so it is 57 years old, older than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 184 ft (56.1 m) long and 33 ft wide.
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Frontage Road 615 over Int Canyon-I 15 built?
It was built in 1968, making it 57 years old in 2025.
What condition is Frontage Road 615 over Int Canyon-I 15 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.
How much traffic does Frontage Road 615 over Int Canyon-I 15 carry?
About 100 vehicles per day (2025 count), of which roughly 3% are trucks.
How long is Frontage Road 615 over Int Canyon-I 15?
The structure is 184 ft (56.1 m) long with a longest span of 87 ft (26.4 m) and a deck 33 ft wide.
Who owns Frontage Road 615 over Int Canyon-I 15?
It is owned by the State Highway Agency.